> advocating putting one's feet on a (step)stool in order to achieve a more optimal position when using a traditional toilet

I haven't seen the NHS flyer but I have seen a photo of a sign from Japan indicating that this is a good idea (also that you should rest your elbows on your knees and bulge your stomach out). I think it certainly helps things (this has got to be the oddest thread I've seen on HN in a while).